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Wet corn gluten feed and steam flaked corn for feedlot cattle and evaluation of 1996 NRC beef energy equations
An evaluation of the beef NRC (1996) model using a historical data set of growing and finishing trials representing over 7,700 cattle and a data set of 916 individually fed cattle found the NRC (1996) model to inaccurately predict ADG (P < 0.0001). Non-linear relationships between required NE adjustment for accurate prediction and desired ADG, TDN intake, and TDN concentration were significant (P < 0.0001). Use of derived equations relating ADG, TDN intake, and TDN concentration to required adjustment should improve ADG prediction. Evaluation of steep liquor inclusion into steam flaked corn and corn bran based finishing diets using yearling steers found no effect (P > 0.05) of steep liquor level on feedlot performance or carcass characteristics. However, low power brought to question no effect of treatments vs. failure to detect effect of treatments. Combinations of wet corn gluten feed (WCGF) and degradable intake protein (DIP) in steam flaked corn based finishing diets for steer calves resulted in quadratic effects (P ≤ 0.05) for WCGF level, with optimum performance at approximately 20% of DM, and indicated DIP requirement of approximately 9.4% of DM. A metabolism trial used yearling steers to evaluate corn processing, corn bran, and steep liquor effects on DMI, feeding behavior, digestion, and metabolism. Rumen pH levels were indicative of subacute acidosis. Treatments interacted to alter (P ≤ 0.05) DMI and intake behavior of steers with subsequent effects and interactions (P ≤ 0.05) on digestibility, microbial protein, rumen NH3-N, and volatile fatty acids. These results suggest interactions noted in previous studies for corn bran and steep liquor on acidosis and feedlot performance appear dependent on interaction with incidence and severity of acidosis. Incidence and severity of acidosis is related to corn processing methods and resulting animal efforts to manage rumen pH by altering DMI and intake behavior. Results of research conducted advance knowledge regarding interactive effects of feed ingredients on, and prediction of, beef cattle production. ^
Agriculture, Animal Culture and Nutrition
Block, Hushton Chance, "Wet corn gluten feed and steam flaked corn for feedlot cattle and evaluation of 1996 NRC beef energy equations" (2003). ETD collection for University of Nebraska - Lincoln. AAI3104605.